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On looking over the machine the next morning, Tuesday, the 27th, the large cap-screws holding the bearings of the main-shaft were found slightly loose. The wrench with the machine was altogether too light to turn these screws up as tight as they should be; it was therefore necessary to have a wrench made from tool steel; that required about half an hour, but it was time well spent.
When it is lowered to a convenient hight it can be examined, and the lower end of the shaft and guide-bearing will be exposed to view. The flange is held securely in the base by eight 3/4-inch cap-screws.
Between the cap-screw holes are eight holes tapped to 3/4-inch, and when it is desired to take the bearing down the cap-screws are taken out of the base and screwed into the threaded holes and used as jacks to force the guide-bearing downward.
The large block which with its threaded bronze bushing forms the nut for the screw is called the cover-plate, and is held to the base of the machine by eight 1-1/2-inch cap-screws. On the upper side are two dowel-pins which enter the lower step and keep it from turning.
Some provision should be made to prevent the bearing from coming down "on the run," for being a taper fit it has only to be moved about one-half inch to be free. Two bolts, about 8 inches long, screwed into the holes that the cap-screws are taken from, answer nicely, as a drop that distance will not do any harm, and the bearing can be lowered by hand, although it weighs about 200 pounds.
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